Button-hole attachment for sewing-machines



(No Model.)

G. RE-HPUSS'. BUTTO N- HOLE ATTACHMENT FOR SEWING MACHINES.

Patented Jan. 20, 1885..

M96. fimzz NITED STATES -A*rnsrr FFIQEO GEORGE REHFUSS, OF PHILADELPHIA,PENNSYLVANIA.

BUTTON-HOLE ATTACHMENT FOR SEWiNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 310,911, dated January20, 1885.

Application filed March 13, 1854.

To (tZZ whom it may concern.-

Be it known that I, GEORGE REHFUss. a

citizen of the United States, residing at Phila vided with a pin, 6*,set upon its face, to one delphia, in the county of Philadelphia andState of Pennsylvania, have invented certain new and useful Improvementsin Button-Hole Attachments for Sewing-Machines; and I do hereby declarethe following to be a full, clear,

and exact description of the invention, reference being had to theaccompanying drawings, which form part of this specification, in whichFigure 1 is a perspective view showing my improvements in position upona sewing-machine. Fig. 2 is an end view, Fig. 3 is a side view, and Fig.4 a horizontal sectional View, of the same.

This invention has relation to bottom-hole sewingmachines of that classwherein the zigzag stitching forming the buttonhole is produced bycausing the needle to change its p0- sion from side to side before eachstitch is made.

The invention has for its object the provision of means foraccomplishingthe change of position of the needle; and it consists in the novelconstruction and combination of parts, hereinafter described, andcomprises devices attached to the head of the machine and to theneedle-bar, which operate in conjunction to cause the needle-holder toreciprocate laterally before each downward movement, and thereby producethe desired effect.

Referring to the accompanying drawings, A is the head of the machine, inwhich the needle-barB works. To thelower end of said bar, and in placeof the usual needle-holder,

. is secured a rectangular block, 0, by a scre\v,a.

D represents a lever, which is pivoted upon the bottom of block 0 by ascrew, 2), and upon the bottom of said lever, in a line with theneedle-bar B, is the usual needle-holding device, c, in which a needle,d, is securedby a set-screw, c. Thelever D projects out beyond the endof the block C and has an upturned end, D, in which is an open-endedvertical slot, 01.

E represents a pinion, which is journaled upon the block B between theend thereof and the upturned end of lever D by a pin, 6, thatprojectsinto a hole, e, in the end of block 0. The pin 9 has a groove,6*, near its inner end.

(No model.)

The end of a sore w, 6", fits in said groove and retains the pin inposition while allowing it to turn freely in hole 0. The pinion Fisproside of the center, which projects into and works freely in the slot(1. The block 0 has a lateral arm, f, upon the side of which isjournaled a gear-wheel, F, by apin, f, that gears with the pinion E, andupon the face of wheel F are three pins, 9 g 9, set at equal distancesaround the center of said wheel. The number of teeth in the gear-wheelare in such proportion to the number of teeth in the pinion thatone-third of a revolution of the former will give a half-revolution tothe latter, and, as will be hereinafter set forth, when the gearwheelrevolves one-third way round, at each upward movement of the needle-barthe pin ion will perform one-half a revolution, thereby moving the leverD to one side a distance sufficient to make the proper stitch forabuttonhole.

H represents a block, which is secured to the head A, and has a verticalslot, h, into which fits an arm, I, pivoted to said block by a pin, h.Within the block, at the bottom of the slot and near its upper end, isplaced a plunger, h", that works in a hole, if, and is forced againstthe inner edge of the arm I by a spiral spring, h. The arm I projectsdownwardly from the block H, and has a tooth, i,

upon its inner edge, which comes into contact with one of the pins 9when the needle-bar ascends, thereby imparting motion to gearwheel F.

The operation of the invention is as follows: When the needle-bar is atthe extremity of its upward stroke. one of the pins 9 is in contact withthe tooth z and the pin next adjacent is in contact with the inner edgeof arm I above said notch. The lever D is now at the extremity of itsmovement to one side, and remains in that position during the descent ofthe me dle bar and until the needle is clear of the cloth on the upwardmovement of the same, the lever I yielding and allowing the pin abovethe tooth to slip past the same. As the needle-bar ascends, the pin 9,which was above the tooth, engages the same, and the gearwheel is, bythe continuance of the upward movement of the needle-bar, caused to makeone-third of'a revolution, thereby moving the lever D to the other side,in which'positionit gearwvheel, thereby turning the sameandcausdescends, and the needle penetrates the cloth to one side of thefirst stitch. The second ascent of the needle-bar causes the gear-Wheelto make another one-third revolution, which brings the lever D back toits original position. It will be noted that when the needlebar isdescending two of the pins 9 g g on the Wheel F are in verticalalignment and bear against the side or edge of the lQVCF-Ztl'ln I, thelatter serving to preserve such alingnment.

What I claim as my invention is as follows:

1. In a button-hole sewing-machine, the combination, with a pivotedlever attached to the reciprocating needle-bar and carrying the needle,a pinion provided with a projecting pin, which engages with said lever,a gearwheel engaging with said pinion and having pins upon its face, ofan arm attached to the sewing-machine head and provided with a tooth,which engages with the pins upon the ing the lever to vibrate,substantially as described.

2. In a button-hole sewing-machine, the combination, with thereciprocating needlebar, a pivoted lever, D, attached thereto andcarrying the needle, and a pinion, E, j ournaled upon a block, 0, uponsaid needle-bar, said pinion engaging said lever, of a gear-wheel, F,having pins g, and a pivoted springarm, I. having a tooth, i, forengagement with said pins, substantially as and for the purpose setforth.

In testimony that I claim the foregoing I 35 have hereunto set my handthis 8th day of March, 1884.

i one. REHFUSS.

lVitnesses 'lnos. A. CONNOLLY, FRANCIS S. BROWN.

